Meze de la koridoro estas tablo, kaj ĉe unu flanko staras seĝo.

Meze is an adverb meaning in the middle or centrally. When Esperanto wants to say in the middle of something, it often uses the pattern:

meze de + noun

So:

• meze de la koridoro = in the middle of the corridor
• literally, something like middle-ly of the corridor

A very similar alternative is en la mezo de la koridoro, which is also common.

The preposition de often shows a relationship like of.

So in:

meze de la koridoro

the de links the middle to the corridor:

• la mezo de la koridoro = the middle of the corridor
• meze de la koridoro = in the middle of the corridor

This is normal Esperanto structure. English uses of here, and Esperanto uses de.

Esperanto does not use a dummy subject like English there in there is / there are.

Instead, it simply says:

• estas tablo = there is a table
• literally: is a table

If you put the location first, the whole sentence sounds very natural:

• Meze de la koridoro estas tablo.

That is a standard way to introduce something that exists in a place.

Both word order and information structure matter here.

In this sentence, the speaker is first setting the scene:

• Meze de la koridoro = location first

Then comes the verb:

• estas

Then the thing being introduced:

• tablo

This makes it feel like In the middle of the corridor, there is a table.

If you said Meze de la koridoro tablo estas, that would sound unusual.
If you said Tablo estas meze de la koridoro, that is grammatically possible, but it sounds more like you are already talking about a specific table and now telling where it is.

So Meze de la koridoro estas tablo is especially natural for scene-description.

Because neither noun is a direct object here.

In Esperanto, -n usually marks the direct object. But in this sentence:

• tablo is the subject of estas
• seĝo is the subject of staras

So they stay in the basic form:

• estas tablo
• staras seĝo

No accusative is needed.

Ĉe usually means at, by, near, or with, depending on context.

Here:

• ĉe unu flanko means something like at one side or by one side

It gives a position near a side rather than strongly emphasizing being inside something. Esperanto often uses ĉe for location next to or at a point.

So this phrase is natural for describing where the chair is positioned.

Unu literally means one, but it can also help mean one of the sides.

So:

• ĉe unu flanko = at one side

This does not necessarily mean a specific already-known side. It just means that the chair is by one side.

If you said ĉe la flanko, that would sound more like at the side or at the particular side already understood from context.

In Esperanto, stari is often used for things that are standing upright or positioned vertically, not only for living beings.

A chair is normally thought of as being upright on its legs, so:

• seĝo staras = a chair is standing

This is very natural Esperanto.

Esperanto often distinguishes positions more clearly than English:

• stari = stand
• sidi = sit
• kuŝi = lie

So an object can also stari, sidi, or kuŝi depending on its position. A chair in normal position usually staras.

Yes, but the meaning and style would be a little different.

• ĉe unu flanko estas seĝo = there is a chair at one side
• ĉe unu flanko staras seĝo = a chair stands at one side

Using staras gives a more visual, descriptive feeling. It tells you not just that the chair exists there, but also presents it as an upright object in the scene.

So staras is more vivid.

For the same reason as in estas tablo: the sentence is presenting a scene.

The pattern

location + verb + noun

is very common in Esperanto when introducing something in a place:

• Sur la tablo kuŝas libro.
• En la ĝardeno kreskas arbo.
• Ĉe unu flanko staras seĝo.

This word order feels descriptive and natural, especially in written narration.

Normally, no.

Sidi means to sit, and while Esperanto can sometimes use position verbs for objects, a chair is normally conceptualized as standing on its legs, not sitting.

So the normal choice is:

• seĝo staras

You might use kuŝas if the chair were lying on its side:

• Seĝo kuŝas sur la planko. = A chair is lying on the floor.

Yes. Kaj is the normal Esperanto coordinating conjunction meaning and.

It connects the two parts:

• Meze de la koridoro estas tablo
• kaj ĉe unu flanko staras seĝo

So the whole sentence simply links two descriptions of the same scene.

The main special letters here are:

• ĉ in ĉe: like ch in church
• ĝ in seĝo: like j in judge

A rough pronunciation guide:

• Meze ≈ MEH-zeh
• koridoro ≈ ko-ri-DO-ro
• ĉe ≈ cheh
• seĝo ≈ SEH-jo

Also remember that Esperanto stress normally falls on the second-to-last syllable:

• ko-ri-DO-ro
• SE-ĝo

Yes, very much so.

Esperanto often likes concise, visual scene-description using:

• a place expression first
• then a verb
• then the thing being described

That is why this sentence sounds natural:

• Meze de la koridoro estas tablo
• ĉe unu flanko staras seĝo

It is a very normal descriptive style in Esperanto, especially in stories or textbook examples.