La guía dijo que ese monumento era más antiguo de lo que parecía.

No. Guía can refer to either a male or a female guide; the article tells you the gender here:

• el guía = the male guide
• la guía = the female guide

So La guía dijo... means the speaker is referring to a female guide.

Also, guía has a written accent because the stress falls on guí-.

Dijo is the preterite of decir, and here it presents the act of speaking as a completed event:

• La guía dijo... = the guide said ...

This is the normal choice when you mean that someone said something at a particular moment.

By contrast, decía is the imperfect, which would usually suggest something ongoing, repeated, or backgrounded:

• La guía decía eso siempre = The guide used to say that all the time.
• Mientras caminábamos, la guía decía... = While we were walking, the guide was saying...

So in this sentence, dijo fits because it is a single completed statement.

Here era is the imperfect of ser, and it is used to describe a state or characteristic of the monument in the reported statement:

• ese monumento era más antiguo... = that monument was older...

The imperfect works well because the guide is describing what the monument was like, not narrating a finished event.

If you used fue, it would sound more like a completed fact viewed as a whole, which is less natural here. In descriptive statements after verbs like dijo, Spanish often uses the imperfect:

• Dijo que era difícil
• Dijo que estaba cerrado
• Dijo que tenía siglos de antigüedad

So era is the normal and natural choice.

For the same basic reason: parecía is describing an appearance, not a one-time completed event.

• parecía = it seemed / it looked
• pareció = it seemed / it appeared at a specific moment

In más antiguo de lo que parecía, the idea is older than it looked/seemed. That is a descriptive comparison of appearance, so the imperfect is the usual choice.

Compare:

• Era más grande de lo que parecía = It was bigger than it looked.
• Pareció enfadado por un momento = He seemed angry for a moment.

The second is more punctual; the first is descriptive.

In this sentence, de lo que is part of a very common Spanish comparative pattern:

• más ... de lo que ...

So:

• más antiguo de lo que parecía = older than it seemed

This structure is often used when the second part is a whole clause rather than just a noun.

Compare:

• Es más caro de lo que pensaba = It’s more expensive than I thought.
• Llegó más tarde de lo que esperábamos = He arrived later than we expected.

A useful way to remember it is that Spanish often uses de lo que where English simply uses than.

Because after a comparative like más, Spanish usually uses de lo que when what follows is a verb clause.

So:

• más antiguo de lo que parecía = correct

But más antiguo que parecía sounds incomplete or unnatural in standard usage here.

A simple rule of thumb:

• Use más... que when comparing with a noun, number, or explicit item

  • más alto que Juan
  • más de cien personas

• Use más... de lo que when comparing with a whole idea or clause

  • más antiguo de lo que parecía
  • más difícil de lo que esperaba

They are both que, but they do different things.

1. dijo que...
   Here que means that and introduces reported speech:

   • La guía dijo que... = The guide said that...

2. de lo que parecía
   Here que is part of the comparative expression de lo que:

   • más antiguo de lo que parecía = older than it seemed

So the first que is a conjunction introducing a clause after “said”, while the second belongs to a comparison structure.

Spanish demonstratives show distance or perspective:

• este = this, near the speaker
• ese = that, near the listener or at some middle distance
• aquel = that over there, farther away

So ese monumento means that monument.

In real usage, especially in modern Spanish, the exact distance distinction is not always super strict, but the basic idea still helps. Here ese is perfectly normal for referring to a monument that is not presented as especially close to the speaker.

Both can relate to age, but they are not always used the same way.

• antiguo often means old/ancient, especially for historical things, buildings, monuments, objects from earlier periods
• viejo often means old in a more general sense, and with objects it can sometimes suggest worn out or simply aged

For a monument, antiguo is the natural choice because it emphasizes historical age:

• un monumento antiguo = an old/ancient monument

If you said un monumento viejo, it could sound less elegant or less specifically historical.

Yes. Antiguo is an adjective, and it must agree with monumento:

• monumento is masculine singular
• so the adjective is antiguo = masculine singular

Compare:

• el monumento antiguo
• la iglesia antigua
• los monumentos antiguos
• las iglesias antiguas

The same would apply if the noun changed.

Yes, that is very likely.

Direct speech:

• La guía dijo: “Ese monumento es más antiguo de lo que parece.”

Reported speech:

• La guía dijo que ese monumento era más antiguo de lo que parecía.

This is a common tense shift in reported speech when the reporting verb is in the past:

• es → era
• parece → parecía

English often does something similar:

• She said, “It is older than it seems.”
• She said that it was older than it seemed.

Yes. It is indirect/reported speech.

Instead of quoting the guide’s exact words, the sentence reports them:

• Direct speech:
  La guía dijo: “Ese monumento es más antiguo de lo que parece.”

• Reported speech:
  La guía dijo que ese monumento era más antiguo de lo que parecía.

Spanish uses que after verbs like decir to introduce what someone said, thought, explained, etc.

Yes. In this context, parecer can often be translated naturally as either:

• seemed
• looked

So:

• era más antiguo de lo que parecía
• could be understood as it was older than it seemed
• or it was older than it looked

Which English version sounds best depends on context, but the Spanish is the same.

Guía is pronounced in two syllables: guí-a.

The accent mark shows that the stress falls on guí and also helps show that the i is pronounced separately from the a, rather than merging into one syllable.

So it is roughly:

• GEE-ah

Without getting too technical, the accent helps signal the pronunciation clearly.

The given word order is the most natural one:

• La guía dijo que ese monumento era más antiguo de lo que parecía.

Spanish does allow some flexibility, but not all changes sound equally natural. For example, you could emphasize parts in other contexts, but this standard order is the best default for learners.

What matters most is keeping these pieces together:

• dijo que...
• ese monumento
• era más antiguo
• de lo que parecía

So yes, there is some flexibility in Spanish generally, but in this sentence the original order is the clearest and most idiomatic.